Jawaharlal Nehru Technological University, Hyderabad
Jawaharlal Nehru Technological University, Hyderabad B.Tech III DESIGN OF SOIL AND WATER CONSERVATION STRUCTURES Previous Question Paper (April - 2018 - R15)
Note: This question paper contains two parts A and B. Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists of 5 Units. Answer any one full question from each unit. Each question carries 10 marks.
PART - A
What is relative loss of energy?
Answer
Relative loss of energy is the ratio of the energy loss occurring in a hydraulic jump to the initial specific energy before the jump. It is expressed as (E1 - E2) / E1, where E1 and E2 are the specific energies before and after the jump, respectively.
Define specific energy.
Answer
Specific energy is defined as the energy per unit weight of water at any section of a channel, measured with respect to the channel bottom. It is given by the sum of the depth of flow and the velocity head: E = y + (v^2 / 2g).
What are energy dissipaters?
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Define crushing and tension.
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Differentiate between aqueduct and inverted siphon aqueduct.
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What are farm ponds? What is its use?
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Define head regulator and its function.
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Define Weir and Barrages.
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What is contour bund?
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What are bench terraces?
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PART - B
Explain the functions of soil erosion control structures.
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Compute the critical depth in a trapezoidal channel for a flow of 30 m3/s. The channel bottom width is 10.0m, side slopes are 2H:1V, the bottom slope is negligible and α = 1.
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Derive an expression for Froude number by assuming that the velocity head coefficient, α is a function of the flow depth.
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The velocity distribution in a channel section may be approximated by the equation, V=V0(y/y0)n. Derive expressions for the energy and momentum coefficients.
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Explain briefly with a neat sketch working of Parshall flume.
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Describe the functions of each component in chute spillway. Why is it so designed?
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What are the disadvantages and advantages of straight drop spillway?
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The reservoir level upstream of 30 m wide spillway for a flow of 800 m3/s is at elevation 200 m. The downstream river level for this flow is at elevation 100 m. Determine the invert level of a stilling basin width as the spillway so that a hydraulic jump is formed in the basin.
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Describe briefly the different types of canal falls with line diagrams.
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Explain the differences between soil conservation and irrigation structures.
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With a neat sketch give the design criteria of trapezoidal notch fall.
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Explain the site selection for needing cross drainage works.
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What are the difference between weirs and barrages? Why is a barrage more preferred to weirs in modern day?
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Give the detail steps in watershed development works. How the Preparation of projects takes place?
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What is Diversion head works? What are Different components of diversions head works?
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Explain the Operation of gates in controlling water in irrigation structures.
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Explain the step by step procedure for the cost estimation for the construction of drop spillway.
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Explain the step by step procedure for the cost estimation for the construction of farm ponds.
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